| abstract |
Stilbene brightener formulations stable against metal ions, comprising a stilbene brightener substituted by sulfo groups and an acidic phosphoric acid ester of a fatty amine oxalkylation product of the formula contain in which R is an aliphatic hydrocarbon radical having 8-22 carbon atoms Y and Y 2 preferably hydrogen, X is the acid radical of phosphoric acid and n and m are integers, n + m being between 2 and 30, especially between 4 and 20. The formulations can also contain various formulation auxiliaries such as nonionic or anionic surfactants and / or organic solvents or polar compounds. The formulations are used for the optical brightening of natural and synthetic fiber materials, for example made of polyamide, cellulose and blended fabrics, as well as paper. |